#ifndef LLVM_CODEGEN_FUNCTIONLOWERINGINFO_H
#define LLVM_CODEGEN_FUNCTIONLOWERINGINFO_H
-#include "llvm/InlineAsm.h"
-#include "llvm/Instructions.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/IndexedMap.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
-#ifndef NDEBUG
-#include "llvm/ADT/SmallSet.h"
-#endif
-#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/CodeGen/ISDOpcodes.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
-#include "llvm/Support/CallSite.h"
+#include "llvm/IR/InlineAsm.h"
+#include "llvm/IR/Instructions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include <vector>
class AllocaInst;
class BasicBlock;
+class BranchProbabilityInfo;
class CallInst;
class Function;
class GlobalVariable;
class MachineFunction;
class MachineModuleInfo;
class MachineRegisterInfo;
+class SelectionDAG;
+class MVT;
class TargetLowering;
class Value;
///
class FunctionLoweringInfo {
public:
- const TargetLowering &TLI;
const Function *Fn;
MachineFunction *MF;
+ const TargetLowering *TLI;
MachineRegisterInfo *RegInfo;
-
+ BranchProbabilityInfo *BPI;
/// CanLowerReturn - true iff the function's return value can be lowered to
/// registers.
bool CanLowerReturn;
+ /// True if part of the CSRs will be handled via explicit copies.
+ bool SplitCSR;
+
/// DemoteRegister - if CanLowerReturn is false, DemoteRegister is a vreg
/// allocated to hold a pointer to the hidden sret parameter.
unsigned DemoteRegister;
/// ValueMap - Since we emit code for the function a basic block at a time,
/// we must remember which virtual registers hold the values for
/// cross-basic-block values.
- DenseMap<const Value*, unsigned> ValueMap;
+ DenseMap<const Value *, unsigned> ValueMap;
+
+ /// Track virtual registers created for exception pointers.
+ DenseMap<const Value *, unsigned> CatchPadExceptionPointers;
+
+ // Keep track of frame indices allocated for statepoints as they could be used
+ // across basic block boundaries.
+ // Key of the map is statepoint instruction, value is a map from spilled
+ // llvm Value to the optional stack stack slot index.
+ // If optional is unspecified it means that we have visited this value
+ // but didn't spill it.
+ typedef DenseMap<const Value*, Optional<int>> StatepointSpilledValueMapTy;
+ DenseMap<const Instruction*, StatepointSpilledValueMapTy>
+ StatepointRelocatedValues;
/// StaticAllocaMap - Keep track of frame indices for fixed sized allocas in
/// the entry block. This allows the allocas to be efficiently referenced
/// RegFixups - Registers which need to be replaced after isel is done.
DenseMap<unsigned, unsigned> RegFixups;
+ /// StatepointStackSlots - A list of temporary stack slots (frame indices)
+ /// used to spill values at a statepoint. We store them here to enable
+ /// reuse of the same stack slots across different statepoints in different
+ /// basic blocks.
+ SmallVector<unsigned, 50> StatepointStackSlots;
+
/// MBB - The current block.
MachineBasicBlock *MBB;
/// MBB - The current insert position inside the current block.
MachineBasicBlock::iterator InsertPt;
-#ifndef NDEBUG
- SmallSet<const Instruction *, 8> CatchInfoLost;
- SmallSet<const Instruction *, 8> CatchInfoFound;
-#endif
-
struct LiveOutInfo {
- unsigned NumSignBits;
+ unsigned NumSignBits : 31;
+ bool IsValid : 1;
APInt KnownOne, KnownZero;
- LiveOutInfo() : NumSignBits(0), KnownOne(1, 0), KnownZero(1, 0) {}
+ LiveOutInfo() : NumSignBits(0), IsValid(true), KnownOne(1, 0),
+ KnownZero(1, 0) {}
};
-
- /// LiveOutRegInfo - Information about live out vregs.
- IndexedMap<LiveOutInfo, VirtReg2IndexFunctor> LiveOutRegInfo;
+
+ /// Record the preferred extend type (ISD::SIGN_EXTEND or ISD::ZERO_EXTEND)
+ /// for a value.
+ DenseMap<const Value *, ISD::NodeType> PreferredExtendType;
+
+ /// VisitedBBs - The set of basic blocks visited thus far by instruction
+ /// selection.
+ SmallPtrSet<const BasicBlock*, 4> VisitedBBs;
/// PHINodesToUpdate - A list of phi instructions whose operand list will
/// be updated after processing the current basic block.
/// TODO: This isn't per-function state, it's per-basic-block state. But
/// there's no other convenient place for it to live right now.
std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate;
+ unsigned OrigNumPHINodesToUpdate;
- explicit FunctionLoweringInfo(const TargetLowering &TLI);
+ /// If the current MBB is a landing pad, the exception pointer and exception
+ /// selector registers are copied into these virtual registers by
+ /// SelectionDAGISel::PrepareEHLandingPad().
+ unsigned ExceptionPointerVirtReg, ExceptionSelectorVirtReg;
/// set - Initialize this FunctionLoweringInfo with the given Function
/// and its associated MachineFunction.
///
- void set(const Function &Fn, MachineFunction &MF);
+ void set(const Function &Fn, MachineFunction &MF, SelectionDAG *DAG);
/// clear - Clear out all the function-specific state. This returns this
/// FunctionLoweringInfo to an empty state, ready to be used for a
return ValueMap.count(V);
}
- unsigned CreateReg(EVT VT);
-
- unsigned CreateRegs(const Type *Ty);
-
+ unsigned CreateReg(MVT VT);
+
+ unsigned CreateRegs(Type *Ty);
+
unsigned InitializeRegForValue(const Value *V) {
+ // Tokens never live in vregs.
+ if (V->getType()->isTokenTy())
+ return 0;
unsigned &R = ValueMap[V];
assert(R == 0 && "Already initialized this value register!");
return R = CreateRegs(V->getType());
}
- /// setByValArgumentFrameIndex - Record frame index for the byval
+ /// GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the
+ /// register is a PHI destination and the PHI's LiveOutInfo is not valid.
+ const LiveOutInfo *GetLiveOutRegInfo(unsigned Reg) {
+ if (!LiveOutRegInfo.inBounds(Reg))
+ return nullptr;
+
+ const LiveOutInfo *LOI = &LiveOutRegInfo[Reg];
+ if (!LOI->IsValid)
+ return nullptr;
+
+ return LOI;
+ }
+
+ /// GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the
+ /// register is a PHI destination and the PHI's LiveOutInfo is not valid. If
+ /// the register's LiveOutInfo is for a smaller bit width, it is extended to
+ /// the larger bit width by zero extension. The bit width must be no smaller
+ /// than the LiveOutInfo's existing bit width.
+ const LiveOutInfo *GetLiveOutRegInfo(unsigned Reg, unsigned BitWidth);
+
+ /// AddLiveOutRegInfo - Adds LiveOutInfo for a register.
+ void AddLiveOutRegInfo(unsigned Reg, unsigned NumSignBits,
+ const APInt &KnownZero, const APInt &KnownOne) {
+ // Only install this information if it tells us something.
+ if (NumSignBits == 1 && KnownZero == 0 && KnownOne == 0)
+ return;
+
+ LiveOutRegInfo.grow(Reg);
+ LiveOutInfo &LOI = LiveOutRegInfo[Reg];
+ LOI.NumSignBits = NumSignBits;
+ LOI.KnownOne = KnownOne;
+ LOI.KnownZero = KnownZero;
+ }
+
+ /// ComputePHILiveOutRegInfo - Compute LiveOutInfo for a PHI's destination
+ /// register based on the LiveOutInfo of its operands.
+ void ComputePHILiveOutRegInfo(const PHINode*);
+
+ /// InvalidatePHILiveOutRegInfo - Invalidates a PHI's LiveOutInfo, to be
+ /// called when a block is visited before all of its predecessors.
+ void InvalidatePHILiveOutRegInfo(const PHINode *PN) {
+ // PHIs with no uses have no ValueMap entry.
+ DenseMap<const Value*, unsigned>::const_iterator It = ValueMap.find(PN);
+ if (It == ValueMap.end())
+ return;
+
+ unsigned Reg = It->second;
+ if (Reg == 0)
+ return;
+
+ LiveOutRegInfo.grow(Reg);
+ LiveOutRegInfo[Reg].IsValid = false;
+ }
+
+ /// setArgumentFrameIndex - Record frame index for the byval
/// argument.
- void setByValArgumentFrameIndex(const Argument *A, int FI);
-
- /// getByValArgumentFrameIndex - Get frame index for the byval argument.
- int getByValArgumentFrameIndex(const Argument *A);
+ void setArgumentFrameIndex(const Argument *A, int FI);
+
+ /// getArgumentFrameIndex - Get frame index for the byval argument.
+ int getArgumentFrameIndex(const Argument *A);
+
+ unsigned getCatchPadExceptionPointerVReg(const Value *CPI,
+ const TargetRegisterClass *RC);
+
+private:
+ void addSEHHandlersForLPads(ArrayRef<const LandingPadInst *> LPads);
+
+ /// LiveOutRegInfo - Information about live out vregs.
+ IndexedMap<LiveOutInfo, VirtReg2IndexFunctor> LiveOutRegInfo;
};
-/// AddCatchInfo - Extract the personality and type infos from an eh.selector
-/// call, and add them to the specified machine basic block.
-void AddCatchInfo(const CallInst &I,
- MachineModuleInfo *MMI, MachineBasicBlock *MBB);
+/// ComputeUsesVAFloatArgument - Determine if any floating-point values are
+/// being passed to this variadic function, and set the MachineModuleInfo's
+/// usesVAFloatArgument flag if so. This flag is used to emit an undefined
+/// reference to _fltused on Windows, which will link in MSVCRT's
+/// floating-point support.
+void ComputeUsesVAFloatArgument(const CallInst &I, MachineModuleInfo *MMI);
-/// CopyCatchInfo - Copy catch information from DestBB to SrcBB.
-void CopyCatchInfo(const BasicBlock *SrcBB, const BasicBlock *DestBB,
- MachineModuleInfo *MMI, FunctionLoweringInfo &FLI);
+/// AddLandingPadInfo - Extract the exception handling information from the
+/// landingpad instruction and add them to the specified machine module info.
+void AddLandingPadInfo(const LandingPadInst &I, MachineModuleInfo &MMI,
+ MachineBasicBlock *MBB);
} // end namespace llvm
projects / oota-llvm.git / blobdiff